User Agent Generator
Online User Agent generator with browser, OS, and device presets to build UA strings quickly, including common templates and custom UA detection.
Generator Settings
Generated Result
Choose options to generate automatically
Common Templates
Custom UA Detection
User Agent Generator Guide
User Agent Generator helps you build and manage UA strings for request headers, making API debugging, compatibility checks, and automation simulation more efficient.
Key Features
- Generate UA strings by browser, OS, and device to cover common test combinations.
- Use built-in templates for Chrome, Edge, Safari, Firefox, and crawler identities.
- Paste any custom UA to detect browser name, version, and operating system quickly.
- Copy generated UA in one click for Postman, curl, crawler frameworks, and scripts.
How to Use
- Choose browser, OS, and device type in the generator settings.
- Copy the generated UA and apply it to the User-Agent request header.
- Paste external UA strings into the custom panel to inspect parsed details.
- Switch with preset templates to test scenarios without manual UA editing.
Typical Scenarios
- API debugging: switch request identities to verify server-side branch logic.
- Crawler simulation: compare responses under different UA strategies.
- Compatibility testing: emulate desktop and mobile clients for regressions.
- Protocol learning: understand User-Agent structure and practical usage in HTTP.
FAQ
- Can I use generated UA directly in production? Validate with your target service before rollout.
- Why might detection differ from real devices? UA strings can be spoofed, so parsing is signature-based.
- Is any UA content uploaded? No, all processing stays in your local browser session.
Privacy
This tool does not send UA content to external services and does not rely on server-side parsing. Input and generated data only exist in current page memory and are cleared after refresh.